Culvert Design Documentation
This section describes culvert design documentation, including hydraulic reports, required field data, and engineering analysis. 3-2.1 Hydraulic Reports The PEO […]
Introduction to Culvert Design
A culvert is a closed conduit under a roadway or embankment used to maintain flow from a natural channel or
Examples of Hydrology
Compute the 25-year runoff for the Spokane watershed shown in Figure 2-3. Three types of flow conditions exist from the
Existing Hydrologic Studies
Existing hydrologic studies have been developed for many rivers in Washington State. FEMA has developed most of these reports. USACE
USGS Regression Equations
While measured flows provide the best data for design purposes, it is not practical to gage all rivers and streams
Published Flow Records
When available, published flow records provide the most accurate data for designing culverts and bridge openings. This is because the
Modeling Requirements
MGSFlood should be used once the PEO has selected the BMP(s) for the project site and has determined the input
Continuous-Simulation Hydrologic Model (Western Washington Only)
When designing stormwater facilities in western Washington, the PEO must use an Ecology-approved continuous-simulation hydrologic model to meet the requirements
Continuous-Simulation Hydrologic Model (Western Washington Only) Read Post »
Runoff Parameters
The SBUH Method requires input of parameters that describe physical drainage basin characteristics. These parameters provide the basis from which